diff -up a/cmake/FindSIP.cmake.sip b/cmake/FindSIP.cmake
--- a/cmake/FindSIP.cmake.sip	2019-04-10 02:00:57.000000000 -0500
+++ b/cmake/FindSIP.cmake	2019-09-16 10:55:35.906667181 -0500
@@ -66,7 +66,7 @@ find_path(SIP_INCLUDE_DIRS sip.h
 )

 execute_process(
-    COMMAND ${Python3_EXECUTABLE} -c "import sip; print(sip.SIP_VERSION_STR)"
+    COMMAND ${Python3_EXECUTABLE} -c "import PyQt5.sip; print(PyQt5.sip.SIP_VERSION_STR)"
     RESULT_VARIABLE _process_status
     OUTPUT_VARIABLE _process_output
     OUTPUT_STRIP_TRAILING_WHITESPACE